Pic isnt gonna show much, a PA has a keel that ends in front of the the rudder. When the rudder crosses midship the forward part of the rudder is rubbing on the keel and i can feel it in the handle and it takes effort to get it to crossover. It needs some type of adjusting to move the rudder aft.

I just looked at mine (pa12). I have 2 to 3" of clearance between the front of the rudder and any part of the boat. Picture may help if you can see where it is rubbing. Pop the steering cover I bet the problem is there. Jim